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and CD8
/ß T Cells in Major Histocompatibility Complex Class Ideficient Mice
Correspondence to: Charles A. Janeway, Jr., LH-416, Howard Hughes Medical Institute and Yale University School of Medicine, 310 Cedar St., New Haven, CT 06510. Tel:203-785-2793 Fax:203-737-1765 E-mail:charles.janeway{at}yale.edu.
Peripheral CD8+ T cells mainly use CD8
/ß, and their development is mainly dependent on the major histocompatibility complex (MHC) class I proteins Kb and Db in H-2b mice. In this report, we have shown that the development of CD8
/ß TCR-
/ß cells in lymphoid organs as well as in intestinal intraepithelial lymphocytes (iIELs) is dependent on the MHC class I Kb and Db proteins. In contrast, TCR-
/ß CD8
/
cells are found mainly in iIELs, and their numbers are unaffected in KbDb double knockout mice. Most of the TCR-
/
cells in the iIELs also bear CD8
/
, and they are also unaffected in KbDb -/- mice. In ß2-microglobulin (ß2m)-deficient mice, all of the TCR-
/ß CD8
/
and CD8
/ß T cells disappear, but TCR-
/
cells are unaffected by the absence of ß2m.
Key Words:
CD8
/
T cells, CD8
/ß T cells, major histocompatibility complex class I, KbDb-deficient mice, ß2m-deficient mice
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